<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>聊天登录</title>
</head>
<body>
    <form method="post" action="/SessionTrack">
        <input type="text" name="username" placeholder="请输入用户名..."/>
        <input type="submit" value="开始聊天"/>
    </form>
</body>
</html>